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National Aeronautics and Space Administration                             December 2025 EARTHDATA DISCOVERY Open Access for Open Science                     Wishing you Seas and Greetings This Holiday Season           The Physical Oceanography and Ocean Biology Distributed Active Archive Centers Have Moved to Earthdata.                   Discover ocean data and resources on Earthdata ➞                       Articles                 Visualize Wildfires in FIRMS with a New Geostationary Layer The Fire Information for Resource Management System (FIRMS) and NASA Worldview now include the Geostationary Ring Natural Color RGB layer — a global mosaic from five geostationary satellites that offers frequent views of Earth throughout the day.           How Two Satellites Measure Gravity and Show Water Loss in the Colorado River Basin Aquifers Researchers used data from the GRACE/GRACE-FO platform to estimate the region has lost a combined 34 cubic kilometers of groundwater since 2002.           NASA-Funded Tool Tracks Floods and Water Risks in North Carolina Researchers used the Emergency Environmental Health Dashboard, which leverages NASA's record of satellite imagery, to assess post-storm impacts to water systems and private wells.           Recap GIS Day with NASA Earth Science To celebrate Geographic Information Systems (GIS) Day, more than 25 teams across the agency created maps and images that showcase NASA data, tools, and projects. These images depict a wide variety of Earth science phenomena, from natural disasters to solar radiation, highlighting the breadth and depth of NASA’s Earth observations.           Supporting Safe Passage in the Changing Arctic NASA’s National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) provides long-term sea ice, iceberg, and climate data that help mariners, planners, and Arctic communities understand changing conditions and make safer decisions in a warming Arctic.                   Webinars & Events                     Advanced NASA Earth Observations and Tools for Active Fire, Smoke, and Post-Fire Monitoring January 14 and 21, 2026           This two-part Applied Remote Sensing Training Program (ARSET) training introduces Spanish speakers to several advanced capabilities within FIRMS, such as how to use the FIRMS aerosol index indices, burned area products, post-fire imagery, and static thermal anomaly information. A repeat of the English session, originally offered in early November, will also be available to provide FIRMS users with an additional opportunity to attend this training.                     Geostationary Remote Sensing of Trace Gases for Air Quality Applications in North America January 20 and 22, 2026 This two-part ARSET training provides an overview of TEMPO capabilities and available trace gas data products and illustrates how TEMPO data can be visualized using NASA Worldview.               ESIP January Meeting January 20 – 23, 2026 Explore what’s on tap at the next virtual Meeting of Earth Science Information Partners (ESIP). These sessions bring together the community for hands-on, interdisciplinary deep dives exploring the theme "Bridging Divides: Data, Technology, Community." Join discussions about cloud technologies, partner and federal engagement, AI-readiness, international collaboration, and much more. Early registration ends December 22.               NASA Satellite Laser Altimetry for Coastal and Near-Shore Bathymetry Delivered December 2 – 4, 2025 This ARSET training introduced how NASA’s Advanced Topographic Laser Altimeter System (ATLAS) is used to map coastal and near-shore bathymetry. The training highlights datasets archived at NSIDC DAAC and supports users applying laser altimetry data in coastal science.               Laser Altimetry Applications for a Changing World: Working with ICESat-2 Inland Surface Water Data Recorded on November 19, 2025 The fifth NASA ICESat-2 data training webinar introduces participants to ICESat-2 inland surface water data, services, and tools.                         Learning Resources           New Tutorial: View IMERG Precipitation Imagery in Worldview In Worldview, users can now visualize daily average and 30-minute Integrated Multi-satellitE Retrievals for GPM (IMERG) precipitation estimates in just a few steps.           Use GIS to Bring Earth Observations to Life Looking to brush up your skills in GIS? You’re in luck—Earthdata has released new tutorials and data recipes for GIS users.           SWOT Unlocks Sea Ice Insights Researchers explore using SWOT data to derive two-dimensional estimates of sea ice thickness.           CALIPSO-NVF Adds to the Legacy of CALIPSO A StoryMap showcasing how the CALIPSO-NVF campaign validated the extended data collection of the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite.           NASA Open Science 101 NASA’s Open Science 101 is a self-paced online curriculum designed to equip learners with the foundational knowledge and practical skills needed to engage in collaborative and transparent research. Key skills taught in this course include data management, open publishing, and research workflow optimization. Complete all five modules and earn a NASA Open Science digital badge that can be shared on social media.                     Data Alerts and Outages           New in Vertex: Generate ARIA-S1-GUNW Products On Demand Users can now generate on-demand interferograms for more than a million ARIA-S1-GUNW products.           HLS Vegetation Indices Products Available in AppEEARS The latest version of the Application for Extracting and Exploring Analysis Ready Samples (AppEEARS) adds HLS Vegetation Indices Products.           Sentinel-6 Michael Freilich Reprocessed Altimetry Datasets Released Reprocessed Level 1A (L1A), Level 1B (L1B), Level 2 (L2), Level 2P (L2P), and Level 3 (L3) altimetry data from the Sentinel-6 Michael Freilich (Sentinel 6A) radar altimeter mission is now available.           VIIRS Version 2 MAIAC Data Products Released NASA's Land Processes Distributed Active Archive Center released the Visible Infrared Imaging Radiometer Suite (VIIRS) Version 2 Multi-Angle Implementation of Atmospheric Correction (MAIAC) data products.           SeaDAS Version 10.0.0 Released NASA's Ocean Biology Distributed Active Archive Center (OB.DAAC) released the Sea, earth, atmosphere Data Analysis System (SeaDAS) version 10.0.0.                   Track Data Outages and New Dataset Releases ➞                     Worldview Images of the Week           Ancient Death Valley Lake Reappears The Operational Land Imager (OLI) aboard the Landsat 8 platform captured an image showing the reappearance of an ancient lake following Death Valley’s wettest fall on record.           First Documented Eruption of Ethiopia's Hayli Gubbi Volcano A true color corrected reflectance image captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua platform shows the first documented eruption of the Hayli Gubbi volcano in Ethiopia.           Floating Photovoltaics in Madhya Pradesh, India Floating photovoltaics at the Omkareshwar Floating Solar Power Park in Madhya Pradesh, India are visible in an image captured by the multispectral Imager (MSI) on the Sentinel-2B platform.           Power Outages Across Jamaica Due to Hurricane Melissa A nighttime image comparison from the VIIRS instrument aboard the joint NASA/NOAA NOAA-21 platform allows users to visualize power outages across Jamaica caused by Hurricane Melissa.                 NASA's Earth Science Data Systems (ESDS) Program oversees the life cycle of NASA’s Earth science data and seeks to maximize the scientific return from missions and experiments.                 Contact Us                 NASA | 8800 Greenbelt Rd., Greenbelt, MD 20771